# include <cstdio>

# define FIN "tablete.in"
# define FOUT "tablete.out"

int N, i, j;

    int main()
    {
        freopen(FIN,"r",stdin);
        freopen(FOUT,"w",stdout);
        
        scanf("%d",&N);
        for (i = 1; i <= N; ++i)
          {
              for (j = 1; j <= N; ++j)
                printf("%d ",(i - 1) * N + j);
              printf("\n");
          }
        
        return 0;
    }